Harmonic sensor
AssigneeMarvell International Ltd.
InventorsMichael Madden, Zining Wu
Life of this patent
Estimating the term…
Abstract
A system including a weighting function module, a frequency sensor module, and a control module. The weighting function module is configured to receive a plurality of samples of data, the data having been obtained based on a head having read the data from a storage medium while the head was at a given height above the storage medium, and to apply a weighting function to the plurality of samples to generate weighted samples. The frequency sensor module is configured to estimate, based on the weighted samples, (i) a first magnitude of a first frequency component, and (ii) a second magnitude of a second frequency component. The control module is configured to estimate, based on the first magnitude and the second magnitude, the height of the head above the storage medium.
Claims20
A system comprising:
- a weighting function module configured to
- receive a plurality of samples of data, the data having been obtained based on a head having read the data from a storage medium while the head was at a given height above the storage medium, and
- apply a weighting function to the plurality of samples to generate weighted samples;
- a frequency sensor module configured to estimate, based on the weighted samples, (i) a first magnitude of a first frequency component, and (ii) a second magnitude of a second frequency component;
- and
- a control module configured to estimate, based on the first magnitude and the second magnitude, the height of the head above the storage medium.
A method comprising:
- receiving a plurality of samples of data, the data having been obtained based on a head having read the data from a storage medium while the head was at a given height above the storage medium;
- applying a weighting function to the plurality of samples to generate weighted samples;
- estimating, based on the weighted samples, (i) a first magnitude of a first frequency component, and (ii) a second magnitude of a second frequency component;
- and
- estimating, based on the first magnitude and the second magnitude, the height of the head above the storage medium.
Dependencies are inferred from the claim text.